320479919 has 2 divisors, whose sum is σ = 320479920. Its totient is φ = 320479918.

The previous prime is 320479889. The next prime is 320479927. The reversal of 320479919 is 919974023.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320479919 is a prime.

It is a super-2 number, since 2×320479919² = 205414756964493122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320479919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320479979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160239959 + 160239960.

It is an arithmetic number, because the mean of its divisors is an integer number (160239960).

Almost surely, 2^320479919 is an apocalyptic number.

320479919 is a deficient number, since it is larger than the sum of its proper divisors (1).

320479919 is an equidigital number, since it uses as much as digits as its factorization.

320479919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 320479919 is about 17901.9529381573. The cubic root of 320479919 is about 684.3321453507.

The spelling of 320479919 in words is "three hundred twenty million, four hundred seventy-nine thousand, nine hundred nineteen".